Which of the following is TRUE regarding phasic receptors?

• A. Phasic receptors respond to sustained stimuli and maintain their firing rate.
• B. Phasic receptors respond with a burst of action potentials when a stimulus is first applied and quickly adapt to the stimulus.
• C. Phasic receptors adapt slowly to changes in stimulus intensity.
• D. Phasic receptors exhibit continuous, constant firing in response to a stimulus.